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INVENTUR (No Model.) I

H. F. SAMPSON. WASHER CONNECTION FOR DOOR KNOBS. No. 435,250. PatentedAug. 26, 1890.

Fig-2- WITNEEEIEEJ UNITED STATES.

PATENT OFFICE.

HERBERT F. SAMPSON, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TOJOHN L. ELLIS, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 435,250, dated August26, 1890.

Serial No. 345,883. (No model.)

To all whom it may concern.-

Be it known that I, HERBERT F. SAMPSON, of Boston, in the county ofSnlfolk and State of Massachusetts, have invented certain new and usefulImprovements in Washer-Connections for Door-Knobs, of which thefollowing, taken in connection with the accompanying drawings, is aspecification.

My invention relates to a method of fastening the washer of a door-knobto the door, the exact nature of which may be best understood byreference to the full specification, the object being to improve andsimplify the construction and arrangement of the parts that form thewasher and its connection. This object I attain by the mechanismshown'in the accompanying drawings.

Figure 1 is a vertical section showing a part of a door with my deviceattached. Fig. 2 is a view in elevation showing the interior of thelock-mortise with my device attached. Fig. 3 is a detail perspectiveshowing the application of my device.

In the drawings the door to which my device is attached is representedby D,and the lock or latch by L.

O is an ordinary spindle having at each end a knob B of any usualpattern. The washers H may be made of metal or of any other suitablematerial.

In washers adapted to my fastening I have a flange I-I' projectinginwardly, as shown. This flange H engages with a corresponding flange Kmade on the screw-thimble K. The screw-thimble K engages with the screwin the-interior of the flanged thimble P, and thus the two thimbles areheld together. The flange P has a large bearing-surface, which restsagainst the wall of the lock-mortise, as shown in Figs-1 and 2.

To prevent the flange thimble PP from turning around when thescrew-thimble is being screwed in, I provide small spurs P which willslightly penetrate the wood of the door. For convenience in turning orscrewing the screw-thimble K, I have small notches N made in theinterior.

In using my device the flange-thimbles PP PP are placed inside of themortise in proper position before the lock or latch is put in. Then thewashers H are applied and the screwthimbles KK inserted and screwed upso as to draw the washers IIH firml y to their places, and the spindle 0may be inserted and the knobs BB attached in the usual manner.

It will be observed that the screw-bearing between the flange-thimble Pand the screwthimble K is quite long, so that the fastening may beadjusted to doors of varying thicknesses.

Having thus described my invention, what I consider as new, and desireto secure by Letters Patent, is-

In washer-connections for door-knobs, the combination of the washer H,having a flange H, the thimble P, having a flange P, adapted to bearagainst the inner wall of the mortise, with the screw-thimble K, havinga flange K, said thimbles P and K and the flanges being adapted to coactto form a clamp for firmly attaching the washer to the door,substantiallyeas and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in thepresence of twov subscribing witnesses, on this 27th day of March, A. D.1890.

' HERBERT F. SAMPSON.

Witnesses:

FRANK G. PARKER, MATTHEW M. BLUNT.

